📐 Aspect Ratio Calculator
Find missing dimensions given a ratio, or calculate the ratio from known dimensions.
About Aspect Ratio Calculator
Resizing images or designing layouts often comes down to maintaining the right aspect ratio. If you know the width and need the matching height — or want to scale something up proportionally without distortion — this calculator handles the math instantly. Just enter the known ratio (like 16:9 or 4:3) and one dimension, and it fills in the missing one.
It also works in reverse: input the pixel dimensions of any image or video to find its exact aspect ratio. Handy for video editing, web design, social media crops, and print projects where consistent proportions are essential. Saves you from doing the division manually every single time.
Leave Width or Height blank — it will be calculated from the other and the ratio.